i have a 1987 inline 6 300 that was efi i have converted it to carbureted but still have the electric in tank fuel pumps i was wondering does anyone know if the place on these blocks in 1987 was machined out for a mechanical fuel pump or not? I would like to put a mechanical on it its possible

 

Hopefully a 300-6 person will notice this and reply.
Back to top for another look.

Maybe post in the older truck forum also, I'm sure a lot of guys have put newer engines in their old truck as well.